What type of printer are you using; KIP, OCE, HP?
In most printer menus, there is a box that is required to be checked when you only want that which is plotted to be cut from the roll and not the entire sheet specified.
On my HP DesignJet T610, under the Features Tab in the Printer Preferences Menu, there is a Box called [Remove top/bottom blank areas]. That box controls the function you are looking for. Again, the controls vary from printer to printer,but you at least get an understanding of what you're looking for.
Good Luck.
David J. Ortega
3D BIM Coordinator
Brady Company/Los Angeles, Inc.
AutoCAD 2011 | AutoCAD Architecture 2011 | Revit Architecture 2011 | NavisWorks Manage 2011